ET MALWARE Suspected APT43 BITTERSWEET Related Activity (POST)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php?v="; fast_pattern;
pcre:"/^[0-9A-F]{12}$/R";
http.header_names;
content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Content-Length|0d 0a|"; startswith;
content:!"Referer|0d 0a|";
http.user_agent;
content:"Mozilla/5.0|20|"; startswith;
target:src_ip;
Raw source ET MALWARE Suspected APT43 BITTERSWEET Related Activity (POST) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Suspected APT43 BITTERSWEET Related Activity (POST)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php?v="; fast_pattern;
    pcre:"/^[0-9A-F]{12}$/R";
    http.header_names;
    content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Content-Length|0d 0a|"; startswith;
    content:!"Referer|0d 0a|";
    http.user_agent;
    content:"Mozilla/5.0|20|"; startswith;
    reference:md5,cd83a51bec0396f4a0fd563ca9c929d7;
    reference:url,mandiant.widen.net/s/zvmfw5fnjs/apt43-report;
    classtype:trojan-activity;
    sid:2044823; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_03_29, deployment Perimeter, performance_impact Moderate, confidence Low, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_29;
    target:src_ip;
)

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